diff --git a/suites/regression/basic/tasks/rbd_fsx_cache.yaml b/suites/regression/basic/tasks/rbd_fsx_cache_writeback.yaml
similarity index 100%
rename from suites/regression/basic/tasks/rbd_fsx_cache.yaml
rename to suites/regression/basic/tasks/rbd_fsx_cache_writeback.yaml
diff --git a/suites/regression/basic/tasks/rbd_fsx_cache_writethrough.yaml b/suites/regression/basic/tasks/rbd_fsx_cache_writethrough.yaml
new file mode 100644
index 00000000000..5c6fc2bd60e
--- /dev/null
+++ b/suites/regression/basic/tasks/rbd_fsx_cache_writethrough.yaml
@@ -0,0 +1,9 @@
+tasks:
+- ceph:
+    conf:
+      client:
+        rbd cache: true
+        rbd cache max dirty: 0
+- rbd_fsx:
+    clients: [client.0]
+    ops: 15000